Simple bag for laptop, sportswear, other

This is an manual  about how to   make efficient the back bag for  nature-based recreation and town walking. 

Step 1 What you need

1)      Piece of fabric 24,5 % 34 inch.

2)      Piece of cord, or ,braid, or ribbon  218 inch. Long

3)      sewing machine or needle and thread

4)      scissors

5)      measuring tape

6)      pencil

7)      iron