JAM Paper & Envelope Strathmore Envelopes & Paper are our most requested paper (envelopes and paper are sold separately). Watermarked and Acid Free. Strathmore Wove & Strathmore Laid papers are 25% cotton and perfect for any invites or resume. Strathmore and Via paper is made with Certified Renewable Energy and approved by Green Seal - an independent non-profit agency dedicated to safeguarding the environment. Available in Bright White, Natural White, & Ivory.