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Dual Entry
Convenient access from the side and front, with flexible pitching options. -
Refined Geometry
Optimized floor plan and canopy shape balance usable space with a compact footprint. -
Adjustable Pitch
Fine-tune height for greater coverage or increased airflow. -
Wind Stability
Tapered profile and aggressive curvatures create a taut, wind-shedding pitch. -
Modular System
Works seamlessly with either the Y-Zip Bug Bivy or 1P Bug Shelter. -
Double-Wall Efficiency
Mitigates condensation while maintaining excellent ventilation.
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Shipping Estimate
USA
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- USA
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Ships within 48 hours · Estimated delivery Jun 29 - Jul 4
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
tarp forum 1P Cirriform Double-Wall SystemThe Cirriform, available with your choice of inner This double wall (DW) system pairs the 1P Cirriform with your choice of the 1P Bug Shelter or Y zip Bug Bivy. Buying the system saves you money compared to buying the components separately. You'll also get an extra stuff sack big enough to fit both items, and we'll pre install all the rigging for you. NOTE: Closeout Cirriforms are available here. They had too much coating applied and are heavier than
The Cirriform, available with your choice of inner
This double-wall (DW) system pairs the 1P Cirriform with your choice of the 1P Bug Shelter or Y-zip Bug Bivy.
Buying the system saves you money compared to buying the components separately. You'll also get an extra stuff sack big enough to fit both items, and we'll pre-install all the rigging for you.
NOTE: Closeout Cirriforms are available here. They had too much coating applied and are heavier than stock.
Description
Learn about the 1P Cirriform DW
At the end of a long day, setting up your shelter should feel straightforward and sure - fast to pitch, solid in wind and rain, and dependable as the light fades. Designed around real trail experience, the Cirriform DW pairs the Cirriform tarp with your choice of inner - the Y-Zip Bug Bivy or 1P Bug Shelter - for a modular, double-wall (DW) setup that's balanced, capable, and trustworthy.
Refined by Experience
Every curve, angle, and stitch of the Cirriform DW has been shaped by years of real trail use - by YAMA and by thru-hikers who've relied on it through wind, rain, and long miles. It's not about chasing the lowest weight; it's about making thoughtful choices that enhance performance, stability, and ease of use.
Dual entry
The dual-entry design offers side access for fair-weather convenience and front access for protection during poor weather or high condensation.
Adaptable and Modular
The Cirriform DW system lets you choose the setup that fits your needs:
- Y-Zip Bug Bivy: Minimalist protection with the smallest footprint and lowest weight
- 1P Bug Shelter: Added room and flexibility for extended trips or variable conditions
Made in Vietnam and field-tested in Montana
Specifications
Weight
With Bivy
- Tarp: 332g | 11.7 oz
- Bivy: 210g | 7.4 oz
- Rigging: 67g | 2.3 oz
- 3 Stuff Sacks: 28g | 1.0 oz
- Total Packaged Weight: 637g | 22.4 oz
With Bug Shelter
- Tarp: 332g | 11.7 oz
- Bug Shelter: 278g | 9.8 oz
- Rigging: 70g | 2.5 oz
- 3 Stuff Sacks: 30g | 1.0 oz
- Total Packaged Weight: 710g | 25.0 oz
Total Packed Size
- With the Bivy: ~10.5" x 7" x 4" | ~27cm x 18cm x 10cm
- With the Bug Shelter: ~10.5" x 7" x 5" | ~27cm x 18cm x 13cm
Cirriform Tarp Dimensions
- Packed size: ~10" x 7.5" x 2" | ~25.5cm x 19cm x 5cm
- For overall dimensions of this tarp, please see the diagram which depict common dimensions for various pitches.
Click to enlarge
Bivy Dimensions
- Length: 86" | 218.5 cm
- Height at head: 23" | 58.4 cm
- Height at foot: 16" | 40.6 cm
- Width at head: 34" | 86.4 cm
- Width at foot: 26" | 66.0 cm
- Tub height: 5" | 12.7 cm
- Packed size: ~9" x 5.5" x 2" | ~23cm x 14cm x 5cm
Click to enlarge
Bug Shelter Dimensions
- Length: 88" | 223.5cm
- Height at head apex: 42" | 107.0cm
- Height at foot apex: 22" | 56.0cm
- Front width: 36" | 91.5cm
- Rear width: 28" | 71.1cm
- Tub depth: 8" | 20cm
- Floor area: 19.6ft2 | 1.8m2
- Zipper length: Full width @ front, ~2/3 length along side, full height to apex
- Packed size: ~11" x 7" x 2" | ~28cm x 18cm x 5cm
Click to enlarge
Durable, Lightweight Materials
The Cirriform DW is made from durable, recycled 20D Silpoly - a lightweight fabric chosen for its reliable performance in outdoor environments.
Tarp: Recycled, 20D Silpoly
Silpoly absorbs less water than silnylon, reducing added weight, and lower sag ensures the tarp stays taut through the night.
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- Weight: 40-41 gsm | ~1.2 - oz/yd2
- Hydrostatic Head: ~1800mm
- Outer face coating: Silicone-based
- Inner face coating: Silicone-based
- PFAS Free: Yes
- Taped Seams: Not taped - Seam sealing is required
- Color: Shark gray
Floor: Recycled, 20D Silpoly
PeU-coated on the interior for improved puncture resistance and reduced slipperiness.
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- Weight:~45 gsm | ~1.23 oz/yd2
- Hydrostatic Head: ~2500mm
- Outer face coating: Silicone
- Inner face coating: PeU
- PFAS Free: Yes
- Taped Seams: Yes
- Color: Shark gray
Canopy: Ultralight, no-see-um mesh
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- Weight:~17 gsm | ~0.5 oz/yd2
- Material: Nylon
- PFAS Free: Yes
- Color: Black
Components:
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- Zipper: YKK, Size #3
- Webbing: Recycled Nylon
- Reflective webbing: Polyester
Required items (not included):
The items needed to pitch your shelter will vary depending on your approach.
- Front Pole: About 44" - 45" (~111 - 114 cm) when pairing with the Bug Shelter or 39" - 42" (~99 - 107cm) when pairing with the Bivy
- Rear Pole: At least 31" (~79cm) when pairing with the Bug Shelter or at least 26" (~66cm) when pairing with the Bivy
- Stakes: 6 (8 for better wind stability)
- Rigging: If you plan to pitch the inner on its own (not under the Cirriform), you will need additional guyline or our Stand-alone rigging kit. If using tent poles or trekking poles without baskets, you may also need two of our guyline grommets (not needed with stand-alone kit).
Notes/FAQ:
- Do I need a groundsheet? A groundsheet is not required, but using one will help extend the life of any floor.
- Do I need to seal the seams? Tarp seams should be sealed using a sealer for silicone coated fabrics (we recommend Seam Grip +SIL by Gear Aid). Optional seam sealing service available. Floor seams are factory-taped and don't require sealing.
Pitching
How to pitch
Start by staking out the corners of the tarp to establish your base. Raise the poles at the peaks and stake them to form the shelter's shape. Adjust and tension the lines evenly for a tight, balanced pitch. Once the outer is secure, attach the inner by clipping the corners and apexes to the tarp. When breaking camp, leave the inner and outer connected so your shelter is ready for a quick, seamless setup next time.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Product Reviews
★★★★★ 5
Stylish and great value!
Color: Medium Grey, Size: 14
This grey suit was a great find for a school ceremony and will definitely be used again. The neutral color makes it easy to pair with different shirts and ties, and it has a modern, clean-cut look. The jacket and pants fit nicely after a quick press, and the quality was better than I expected for the price. It lost a star only because the waist on the pants needed a slight adjustment, but overall, we’re very happy with it!
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Reviewed in the United States on October 10, 2025
★★★★★ 3
Runs big, and fabric may not be same color as picture
Color: Medium Grey, Size: 16, Color: Medium Grey, Size: 16
This suit was a good find for us, as we usually dress up for church, and my 13 yo son often wears suits. He normally wears a size 16, so that’s what we ordered, and in dark charcoal gray. The suit we got was a light, heathered gray that didn’t look much like the one in the picture. It was very wrinkly and thin, and a little scratchy. Also, the sleeves were way too long and the torso cut of the jacket was pretty wide. The pants were very large in the waist, but fit him decently in the length (he’s 5’4” and weighs 90 lbs). Overall the suit looked like it was drowning him, so I would order a size down unless you have a larger child/teen. Because of the ill fit, I haven’t had the chance to see what the suit looks like on him as it’s supposed to, but I guess I’ll return it or wait a year or two until he fills it out a bit more. Not overly impressed with the quality, so I’m not sure I’d pay $55 for this one again.
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Reviewed in the United States on October 20, 2025
★★★★★ 5
Super soft, runs small, long tail
High quality, super soft, good neck height, nice price, ready to go right out of the dryer, medium thick material, works well under a sport coat or sweat shirt, snug fit--runs about one size small. Length is about four inches too long. So, ideally made for tall and skinny people (I am short and thick), but going one size up works fine for me except have to tuck it in due to the length.
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Reviewed in the United States on December 26, 2025
★★★★★ 5
This shirt is a cheat code
Color: Black, White, Navy Blue, Light Gray, Size: XX-Large
These shirt fits my body so perfectly!
I’m 6’5” 310 pounds but I look 260 pounds. I sweat easily and I’m very sensitive to the material a piece of clothing is made of. This shirt is lightweight, extremely breathable, and feels like silk on the skin.
It compliments and accentuates my contours to enhance my physique. I only tried on one and I’ve already ordered 12 more hehe. This is a cheat code.
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Reviewed in the United States on November 24, 2025
★★★★★ 4
I Love the collar
Color: Black, White, Navy Blue, Wine Red, Size: Large
Great T-shirt. I can wear this casually with jeans or with a sports coat. The fabric is soft. There is no label in the collar, so you can wear it however you want.
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Reviewed in the United States on May 29, 2026