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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12
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For Your Every Summer RSVP, with Code: SUMMER15
Description
SealLine Blocker DRY Compress 20LWaterproof, lightweight dry sack with space saving compression. Our most versatile, feature laden packing system sack, the Blocker Compression Dry Sack saves space on paddling and trail adventures, while the waterproof valve rapidly vents trapped air to ease compressionall this with fully waterproof construction ensures essential contents are protected, condensed and organized. Description Versatile materials: Lightweight 70D polyurethane coated nylon
Waterproof, lightweight dry sack with space-saving compression.
Our most versatile, feature-laden packing system sack, the Blocker Compression Dry Sack saves space on paddling and trail adventures, while the waterproof valve rapidly vents trapped air to ease compression—all this with fully waterproof construction ensures essential contents are protected, condensed and organized.
Description
- Versatile materials: Lightweight 70D polyurethane-coated nylon materials are a tougher, more resilient cousin to the ultralight BlockerLite materials. More durable and versatile, these materials are great for all-around use with confident waterproof protection.
- Smarter compression: Unlike conventional systems that pull against seams, our Continuous Compression system encircles the sack to minimize seam strain, maximizing durability for dependable protection.
- PurgeAir™-equipped: Our unique and waterproof PurgeAir valve vents trapped air, helping the sack compress further after being sealed, and is both more durable and more reliably waterproof than waterproof/breathable fabric membranes.
- Waterproof closure: Roll-top closure features a wrinkle-free stiffening strip to ensure a secure seal when closing the dry sack.
- Durable construction: Fully welded seams result in stronger and more durably protective construction compared to sewn-and-taped seams.
- Efficient-Packing: PackTight™ packing system sacks feature flat-sided, rectangular shapes that nestle closely together, packing 20% more efficiently than rounded sacks for easy, space-saving organization.
Tech Specs
| 10 LTR | 20 LTR | 30 LTR | |
|---|---|---|---|
| Color | Orange | Orange | Orange |
| Weight (Standard) | 4.4 oz | 5.9 oz | 6.9 oz |
| Weight (Metric) | 0.12 kg | 0.17 kg | 0.20 kg |
| Width (Standard) | 4.3 in | 5.5 in | 6.2 in |
| Width (Metric) | 11 cm | 14 cm | 16 cm |
| Length (Standard) | 8.2 in | 10.4 in | 12 in |
| Length (Metric) | 21 cm | 26.5 cm | 30.5 cm |
| Height (Standard) | 14.1 in | 18.8 in | 22.8 in |
| Height (Metric) | 36 cm | 48 cm | 58 cm |
| Volume (Standard) | 610 cu. in | 1220 cu. in | 1831 cu. in |
| Volume (Metric) | 10 liters | 20 liters | 30 liters |
| PVC-Free | Yes | Yes | Yes |
| Closure | Roll-down | Roll-down | Roll-down |
| Bottom Shape | Rectangular | Rectangular | Rectangular |
| Protection Level | waterproof | waterproof | waterproof |
| Material(s) | 70D polyurethane-coated nylon | 70D polyurethane-coated nylon | 70D polyurethane-coated nylon |
| Country of Origin | Made in China | Made in China | Made in China |
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
4.6 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
The only socks I will buy
Size: 6-10, Color: Halo Gray/Assorted
These are hands down my favorite socks to wear with tennis shoes. Bought my original 6 pack in the store, liked them so much I went buy more and they were gone. These don't slip on your heel like most socks do. Come up high enough on the top of your foot to protect from tongue rubbing (I giggled when I wrote that) and they come in fun colors. Love they are ultra no show and provide padding but people can't see them with shoes on. Five stars!
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Reviewed in the United States on January 12, 2023
★★★★★ 5
Socks
Size: Medium, Color: Black
Amazing socks. Fits Amazing.
I tried to buy the six pack and it wasn’t the same. Thinner material. The 3 pack is great. Would buy again if it comes up.
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Reviewed in the United States on September 16, 2025
★★★★★ 4
Amazing socks but false advertising. They changed them.
Size: Large, Color: Black (6-pairs)
Okay well I have 4 stars because these are the best socks ever, infact, I threw out all my other socks and switched to just these. No show and they never slip. THE PROBLEM NOW, all the pairs I ordered before had a white symbol, and every time I buy more they have the grey and they are not as low show as my others… I wanted to simplify life and have all the same kind, no matching of colors or slightly different shape, but 4 times now I’ve ordered white symbol and gotten thicker longer ones with gray symbols. I’m considering switching all of my socks to the gray…. But the white symbol ones are way better, they don’t show with hey dudes on and gray symbol ones do now. I’m at a loss. Can someone tell me where to buy 100 pairs of white symbol so I never need to buy another sock again in my life?
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Reviewed in the United States on January 24, 2025
★★★★★ 5
My favorite
Size: Medium, Color: Opal Blue/White/Cruise Blue (3-pairs)
My favorite socks, too bad under armour discontinued the cotton blend fabric and went to 100% polyester 😠
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Reviewed in the United States on March 16, 2026
★★★★★ 5
Comfortable
Size: 6-10, Color: Halo Gray/Assorted
These are my favorite socks!
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Reviewed in the United States on September 22, 2025