Sea to Summit Ultra-Sil Dry Sacks are a super light weight dry sack designed for use inside a pack. Made from Siliconised Cordura for maximum durability Ultra-Sil Dry Sacks will keep your pack light and you gear bone dry!
Sea to Summit says:
The Ultra-Sil® Dry Sack is the ideal dry sack for backpackers who need to protect their belongings from wet weather. They are 50% lighter than our Lightweight Drysacks but slightly heavier than our Ultra-Sil Nano Drysacks.
Getting very good reports about the Drybags from customers. These Sea to Summit (STS) Ultrasil Drybags are a similar product to POD Ultralite Drysacs - the difference is that the POD version has a larger buckle fastener and a haul strap across the base this makes the POD sacs a few grams heavier in each size.