Birchwood Casey Universal Front Rest Bag Wide Filled. It is shaped to fit different front-end sizes to maximize the usage of one shooting rest. The rest is constructed of leather and polyester with hook & loop straps which creates a solid a secure rest. The base dimensions are 5" L x 2" W x 2" H at humps and 1" high at saddle. Specifications for Birchwood Casey Universal Front Rest Bag: Manufacturer: Birchwood Casey Size: One Size Package Contents: Birchwood Casey BC-UFRB-MED Universal Front Rest 5" Long Polyester With Leather Birchwood Casey BC-UFRB-WID: Universal Front Rest Bag Wide Filled