Sentry II bag features a double layer of fabric for extra strength and
has efficient drainage. Fabric is made of spunbonded polypropylene
fibers, and a single layer weighs 2.24 oz/sq yd, and has a tensile
strength of 26 lbs/inch, yet has an air permeability factor of 300 cu
ft/sq ft. Each sample bag comes with a 2 x 3" sewn-in tag for sample
identification and tie tape sewn into seam. Shipping weight for 25 bags is 8 lbs.