The Ultralight Raincovers from Osprey are the perfect companions for wet backpacking adventures where lightweight shielding against rain and moisture is part of surviving your trip. These raincovers are made from a durable and weather-resistant 40D ripstop nylon, and pack-away into their easy-storing compact securing cases. They close with a full wrap around cinch cord and feature hipbelt and harness attachments. The medium cover fits packs between 30 and 50-litres, and the large size is intended for packs ranging from 50 to 75-litres.