The Hollis decompression buoy, measuring 120cm x 12cm, is made of durable nylon. It features an over-pressure valve and a stainless steel quick-connect for an inflator hose to quickly fill the buoy with a hose from a drysuit. At the bottom, the buoy has a metal D-ring for attaching a spool and a bungee for quick securing of the buoy to prevent it from unrolling.