Blanket: Batt and Roll Insulation Blanket insulation -- the most common and widely available type of insulation -- comes in the form of batts or rolls. It consists of flexible fibers, most commonly fiberglass.
1 In the United States, rapid-acting insulin, Lyspro (humalog) is mixed with NPH in a 50:50 (50% NPH and 50% insulin Lyspro) and 75:25 (75% NPH and 25% insulin Lyspro) ratio.  Insulin/Aspart (Novolog) combinations also are available as 70:30 mixtures (70% NPH, 30% insulin aspart).
1 Remove pen cap. 2  Look at the insulin. 3  Short or rapid-acting insulin (Regular, Humalog, NovoLog, and Apidra) and Lantus or Levemir should appear clear. 4  Do not use it if the drug appears to have pieces in it or is discolored. 5  Intermediate or mixed insulin (NPH, 75/25, 70/30, or 50/50) will appear cloudy and white. This type of insulin should be gently mixed before use. 2  To do this, roll the pen between your hands. 3  You must also turn the pen up and down ten times as shown in picture (Fig. 2). 4  Look at the insulin to be sure it is evenly mixed (cloudy white) with no clumping of particles.