10" x 13" Heavyweight Clasp Envelopes are an excellent solution for accessible storage and filing. Whatever your home or office needs are, clasp envelopes make organizing easier. They're great for projects, filing and mailing. Double-prong clasp and reinforced eyelet are durable enough for repeated use. 28 lb. brown Kraft stock is great for extensive handling and mailing. Contents are protected during use to give you assurance they arrive unharmed. Heavy gumming keeps envelopes securely and permanently sealed when needed. 10" x 13" size accommodates most documents without folding.10" x 13" Heavyweight Clasp Envelopes are an excellent solution for accessible storage and filing. Whatever your home or office needs are, clasp envelopes make organizing easier. They're great for projects, filing and mailing. Double-prong clasp and reinforced eyelet are durable enough for repeated use. 28 lb. brown Kraft stock is great for extensive handling and mailing. Contents are protected during use to give you assurance they arrive unharmed. Heavy gumming keeps envelopes securely and permanently sealed when needed. 10" x 13" size accommodates most documents without folding.