FS 3+1 Nemi's Back Weave

UUUO/UUOUO F1

FS 3+1/2+1+1+1, Nemi's Back Weave

A stitch type invented by German Nemi Norison (4/2013).
There's a "woven-like" structure on the reverse side of the fabric. 

FS 3+1/2+1+1+1, Nemi's Back Weave  UUUO/UUOUO F1 front side

FS 3+1/2+1+1+1, Nemi's Back Weave  UUUO/UUOUO F1 reverse side

Three loops around thumb, pick up one behind thumb. On the way back, insert the needle only under the second thumb loop (one in the middle), and under the needle yarn.