Sea to Summit Ultra-SIL Stuff Sack, HighRise Grey, 1.5 Liter — Ultralight Water-Resistant Packing Pouch

Sea to Summit Ultra-SIL Stuff Sack 1.5L is an ultralight, water-resistant packing pouch designed to organize clothing and gear inside a pack while resisting abrasion and shedding water.

The Ultra-SIL Stuff Sack combines featherweight construction with purposeful details so you can keep essentials tidy without adding bulk. Made from bluesign-approved 30D Ultra-Sil Cordura nylon and treated with a non-PFC DWR finish, this 1.5-liter sack slips easily into tight spaces, secures contents with a tear-proof drawcord, and includes reinforced stress points for reliable everyday use. Its small footprint and low weight make it a practical option for minimalist backpackers, travelers who value organized luggage, and day hikers who want quick access to frequently used items.

How does this stuff sack protect items from moisture and rough use?

The sack’s Ultra-SIL fabric is water-resistant and treated with a non-PFC durable water-repellent finish to shed light rain and splashes. Reinforced seams, Hypalon pull tabs, and double-stitched stress points help prevent wear from repeated packing and unpacking.

• 30D Ultra-SIL Cordura nylon with non-PFC DWR for water-shedding capability
• Double-stitched seams and reinforced stress points for durability
• Tear-proof drawcord top and Hypalon tabs for repeated use
• Reinforced webbing handle on the base for secure pulling and carrying

How compact and light is the 1.5-liter version for travel and trekking?

This model measures 4.5 x 8.1 inches and weighs only 0.04 pounds, so it adds virtually no weight or bulk to your pack. It’s sized to hold small clothing items, electronics accessories, first-aid supplies, or consumables without wasting space.

• 1.5-liter internal volume fits socks, underwear, a lightweight layer, or small gear
• Slippery fabric makes insertion into tight pack pockets effortless
• Minimal folded size when empty for space-saving storage

How does the closure and handle design make packing faster?

A simple tear-proof drawcord with a Capture Cord Lock closes the bag quickly and keeps contents contained. The round base includes a reinforced webbing pull handle so you can slide the sack into deep pack compartments or hang it for storage.

• Capture Cord Lock keeps drawcord secure with one-handed operation
• Hypalon pull tabs offer durable grip points during opening and closing
• Base webbing handle provides a positive grab when loading or unloading

How do I decide what to pack in a 1.5-liter Ultra-SIL sack?

Choose small items that benefit from organization and quick access—socks, underwear, chargers, toiletries, or snack portions. The sack keeps those items separated from bulkier gear so finding them in a full pack is fast.

• Use for under-layer, socks, or compact sleepwear in multi-day trips
• Ideal for electronics cables, power banks, and small chargers
• Great as a toiletry pod for travel toiletries and quick-access essentials

Who is this for: The Sea to Summit Ultra-SIL Stuff Sack 1.5L is aimed at ultralight backpackers, minimalist travelers, and everyday packers who need a near-weightless, durable organizer that resists moisture and slides into tight spaces. It suits anyone who values ordered gear, fast access, and a small, tough storage solution that won’t add appreciable weight to a pack.