Sea to Summit Ultra-SIL Compression Sack 5L – Ultralight Travel Storage (Zinnia Yellow)

The Sea to Summit Ultra-SIL Compression Sack is designed for travelers and outdoor enthusiasts who value compact packing without sacrificing accessibility. Crafted from bluesign-approved 30D Ultra-Sil Cordura nylon with a non-PFC DWR finish, this 5-liter sack compresses bulky clothing and gear so you can fit more into a single bag. The bright Zinnia Yellow exterior makes contents easy to spot in dim gear closets or crowded packs, and the satin-like finish helps items slide into place even when space is tight. An attached flip-top lid prevents tangled straps and keeps contents within easy reach, whether you’re sprinting through airport security or setting up camp after dusk.

Space-Saving Design

Designed to maximize packing space, the sack reduces bulk by as much as two-thirds, so you can squeeze in essentials and still close your bag with confidence. The three-strap system delivers even compression across the load, and the round base provides stable shape to minimize shifting inside larger bags.

• Ultra-lightweight yet durable container for clothing and gear
• Bluesign-approved 30D Ultra-Sil Cordura nylon with a non-PFC DWR finish
• Slippery fabric reduces friction and helps items slide into tight spaces
• Attached flip-top lid prevents tangled straps and allows quick access
• Three straps with two ladderlock buckles and one side release buckle for even compression
• Reinforced round base and webbing pull handle for easy carrying

Durability and Craftsmanship

Double-stitched seams and reinforced stress points are built to withstand regular use on trails, in camps, and during travel. The sack is water-resistant, offering protection from light rain and splashes, while remaining flexible for packing. The 5-liter version weighs about 0.12 pounds, delivering a lightweight footprint for weight-conscious travelers.

Size, Weight, and Specs

Available in multiple sizes to accommodate different gear. The 5L sack measures 6 x 11.7 inches and weighs approximately 0.12 pounds. Materials and construction are chosen for longevity and easy care.

• Sizes: 5L, 8L, 13L, 20L, 35L
• Weight (5L): ~0.12 pounds
• Material: Bluesign-approved 30D Ultra-Sil Cordura nylon with non-PFC DWR

Sea to Summit backs its products with a lifetime guarantee against defects in materials or workmanship. Note that stuff sacks are water-resistant, not waterproof.