I see this information on the amazon page.

PROFESSIONAL GRADE ADHESIVE FASTENERS: These industrial strength hook and loop fasteners provide strong holding power designed for heavy-duty applications; safely holds up to 10 pounds
WATER RESISTANCE PROVIDES UNMATCHED VERSATILITY: With heavy-duty strength, these fasteners make the ultimate organization tool for mounting, hanging, storing, or securing items indoors or outdoors; adheres to most surfaces in the house and garage