48" x 48" Dunnage Air Bags | Level 1 Poly Woven | 10-PackInflatable dunnage bags are an effective way to secure cargo and prevent shifting during transit. Designed for use in vans, trailers, railcars, and overseas containers, these poly woven air bags fill voids between freight to reduce movement and absorb shock. The two way locking valve system allows for fast inflation and deflationtypically in under 30 secondswhile keeping air from escaping during the fill. Use regulated and filtered air at 90 PSI for