1 Merino is one of the softest types of wool available, because of finer fibers and smaller scales.  Merino has an excellent warmth-to-weight ratio compared to other wools, in part because the smaller fibers have microscopic cortices of dead air, trapping body heat similarly to the way a sleeping bag warms its occupant.
Transistorâtransistor logic (TTL) is a class of digital circuits built from bipolar junction transistors (BJT) and resistors.
1 TTL is part of the Domain Name System. 2  TTLs are set by an authoritative nameserver for each resource record.  TTLs are used for caching purpose. For example, www.dnsknowledge.com TTL value is 86400 seconds, which is 24 hours. The higher a recordâs TTL, the longer the information will be cached, and the less queries a client will have to make in order to find the domain.