The Sandstorm 150x150mm Square Envelope 104gsm is a warm-toned, caramel colour with a recycled fibrous look but without the texture, the finish is smooth. Sandstorm matches perfectly with the envelopes, paper and card in the Sandstorm range. Lick and stick to seal envelopes or use a damp sponge. 30% PCW Recycled. Laser & Inkjet compatible however we recommend testing our papers and envelopes with your printer first.