Apex domains cannot have CNAME records.
Question and response
Question
dig finefitwear.com. NS
Answer
finefitwear.com. 5 NS ns-1315.awsdns-36.org.
finefitwear.com. 5 NS ns-997.awsdns-60.net.
finefitwear.com. 5 NS ns-25.awsdns-03.com.
finefitwear.com. 5 NS ns-1782.awsdns-30.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0