Почему изделия из сильно крученых нитей хуже сохраняют тепло?

решение
            14                         15                          16                             17
             5                           5                              3                              6
3                   2          1              6           5                  7             4             2
6                  7          7                2          4                  2             1              3
            1                          4                               6                               7

решение
            14                         15                          16                             17
             5                           5                              3                              6
3                   2          1              6           5                  7             4             2
6                  7          7                2          4                  2             1              3
            1                          4                               6                               7