Fully waterproof fabric with C0 DWR Fully wrapped elastic cinch with hip belt attachment loops provides easy & secure fit Lightweight & durable fabrics Integrated stuff pocket provides easy pack/unpack-and-go Specs: Medium fits packs 30-50L, Large fits packs 55-75L, and XL fits packs 80-105L. I hear the drums echoing tonight—or is that thunder? With this lightweight and easy-to-stow waterproof rain cover, you can quickly cover your pack to keep your gear dry no matter how suddenly the storm hits. It adjusts almost as quickly as a lighting strike, and comes in three convenient sizes: medium for 30–50 liter packs, large for 55–75 liter packs, and XL for 80–105 liter packs. Save the soggy bottom for your SCUBA trip