Cotton / Linen thread
absolutely smooth hand sew thread
Cotton blending linen thread provides different texture and performance than linen thread. Cotton blending linen thread does not have "humps" which linen thread has. With special bee wax cotton/linen thread provides extreme smooth but strong feeling during hand stitching. 
Product specs
Material : Cotton blending linen
M65 (0.65mm), 150 meters 10USD / spool
M55 (0.55mm), 180 meters 11USD / spool
M45 (0.45mm), 280 meters
12USD / spool
M35 (0.35mm), 320 meters
18USD / spool