These well constructed canvas vests have padded shoulders for added comfort and strong web straps that adjust to fit all sizes. Available in the following weight variations: 10 lbs Fixed, 20 lbs Fixed, 0-20 lbs Adjustable weight: 8 - 2.5 lb weight packs, 0-30 lbs Adjustable weight: 12 - 2.5 lb weight packs, or 0-50 lbs Adjustable weight: 8 - 6.5 lb weight packs.