“Don’t put window envelopes in a printer.” That’s been the common wisdom forever. Stamps.com is upending it with our #10 Heat-Resistant Double-Window Security Tint Envelopes! Print your postage with confidence, mail your bills, invoices and business correspondence with security!

• Special heat-resistant window does not melt when printing postage using a laser printer
• The tinted pattern inside discourages reading sensitive information through the envelope
• With Pull & Seal strip there is no mess, no moistening, just peel off the strip and press
• 24 lb. white wove paper provides clear crisp printing