Only tried once, and it was at best a very qualified success. Removed all the elastic, hemmed the raw edge and sewed on 2 tie tapes per corner. The problem was adjusting the knots on the tapes when putting the sheet back on the bed. Maybe using a strip of elastic instead of tapes would work? Sorta kinda like the elasticated tapes on a mattress protector sheet. On the plus side, the sheet was very easy to wash and fold once the tapes were untied.
Only tried once, and it was at best a very qualified success. Removed all the elastic, hemmed the raw edge and sewed on 2 tie tapes per corner. The problem was adjusting the knots on the tapes when putting the sheet back on the bed. Maybe using a strip of elastic instead of tapes would work? Sorta kinda like the elasticated tapes on a mattress protector sheet. On the plus side, the sheet was very easy to wash and fold once the tapes were untied.
This mattress is way too heavy to tie under! Diagonal elastic corners would be an affordable experiment