Step by step

Step 1

Lay the sock flat on your table and then cut two slits that are a bit smaller than the long edge of the hand warmers into one edge. The slits will stretch a bit during Step 2 so don’t make them too big.

Step 2

Sew a basting stitch around the edges of the slits to prevent fraying, then fold the edge inwards and sew it down with a straight stitch to produce a neat edge. We used a sewing machine, but this can be done by hand if you don’t have one.

Step 3

Sew a button onto the middle front edge of both slits and then sew loops of elastic onto the back edges so they line up with the buttons. Once done up, this will keep the hand warmers in place and prevent them from falling out.

Step 4

Sew a seam across the cuff and toe of the sock, and also across the middle (roughly where the heel is) to form two enclosed pockets. This is where the hand warmers will be fitted. We used a sewing machine here (and Step 5) but a needle and thread is fine.

Step 5

Next, sew the 5cm strip of Velcro (loops up) to the outside of the one end of the sock, then sew the 11cm strip (hooks up) to the inside of the other end, leaving a piece hanging over the edge. Fastening this will keep the heater attached to the lens.

Step 6

Activate the two hand warmers, pop them into the pockets and fasten the buttons. You can now wrap the dew heater around your camera lens and secure it with the Velcro. Be careful to avoid part of the sock covering the lens as you don’t want sock vignetting!